4” Storm Collar

4 Inch Storm Collar is designed to help protect the area where a compatible 4-inch vent pipe passes through a roof flashing. Installed around the pipe and positioned above the flashing, the collar helps direct rainwater away from the roof penetration.

This component is commonly used as part of an approved exterior vent installation. It must be properly sized, positioned and sealed to provide effective protection against water intrusion.

4 Inch Storm Collar Features

• Designed for compatible 4-inch vent pipe
• Helps direct rainwater away from the roof opening
• Installs above a compatible roof flashing
• Durable metal construction
• Suitable for approved exterior vent installations
• Compact design for a secure fit around the pipe
• Professional installation recommended

Helps Protect Roof Penetrations

A vent pipe passing through a roof creates an opening that must be properly protected from outdoor weather. Roof flashing covers the surrounding roof area, while the storm collar helps protect the upper portion of the flashing where it meets the pipe.

The 4 Inch Storm Collar directs water outward and away from this connection. Proper installation can help reduce the possibility of rainwater traveling down the exterior surface of the pipe and entering the roof opening.

Designed for 4-Inch Vent Pipe

This storm collar is intended for a compatible pipe with a nominal 4-inch size. Before ordering, verify the outside dimensions, vent type and connection requirements of the existing installation.

Vent products with the same nominal diameter may have different outside dimensions or construction methods. Compatibility should be confirmed with the vent-pipe and flashing manufacturer before installation.

Works with Compatible Roof Flashing

The 4 Inch Storm Collar is not a replacement for roof flashing. The two components perform complementary functions within the roof-penetration assembly.

The flashing protects the area where the vent passes through the roof surface. The storm collar is installed above the flashing and fits around the vent pipe to help shield the upper opening from rainwater.

Both components must be compatible with the pipe, roofing material, roof pitch and application. The complete assembly should be installed according to the product manufacturer’s instructions and applicable local requirements.

Installing the 4 Inch Storm Collar

Before installation, inspect the collar for dents, deformation or other visible damage. Confirm that it fits correctly around the compatible 4-inch vent pipe.

Position the 4 Inch Storm Collar around the pipe above the roof flashing. The collar should overlap the upper opening of the flashing without preventing water from draining properly.

Apply an exterior-grade sealant approved for the pipe and collar materials around the upper edge where the collar meets the vent. Do not apply sealant in a way that traps water inside the flashing assembly.

Follow all instructions supplied by the vent, flashing and roofing manufacturers. Installation methods can vary depending on the vent system and roof construction.

Proper Sealing Is Essential

The upper connection between the collar and pipe must be properly sealed to help keep water from running beneath the collar. Use a sealant rated for exterior exposure and compatible with the installed materials.

Ordinary interior caulk or household tape should not be used as a substitute for an approved weather-resistant sealant. Improper sealing may crack, separate or deteriorate after exposure to sunlight and temperature changes.

Vent Clearances and Compatibility

Installing a storm collar does not change the required clearances for the vent pipe. Maintain the distances from combustible materials specified by the appliance manufacturer, vent manufacturer and applicable codes.

The collar should not interfere with the vent’s required movement, locking connections or listed installation configuration. Any modification that damages the vent pipe can affect the safety and performance of the system.

Exterior Weather Protection

The 4 Inch Storm Collar is exposed to rain, sunlight, wind and changing outdoor temperatures. Routine inspection helps identify damaged sealant, movement or physical wear before water intrusion affects the surrounding roof area.

Severe weather, roof repairs or movement of the vent pipe may disturb the collar. Inspect the roof penetration after major storms or whenever roofing work is completed nearby.

Inspection and Maintenance

Check the storm collar periodically to ensure it remains securely positioned around the pipe. Examine the upper sealed edge for cracks, gaps or separation.

Also inspect the roof flashing and nearby roofing materials. Water stains, corrosion or damaged roofing may indicate that the complete penetration requires professional evaluation.

Replace damaged components instead of attempting to repair severely deformed or corroded pieces. A qualified professional can determine whether the collar, flashing or vent system requires replacement.

Professional Installation Recommended

Professional installation of the 4 Inch Storm Collar is recommended. Working on a roof involves fall hazards, and improperly installed vent components may allow water intrusion or create an unsafe venting condition.

A qualified professional can verify product compatibility, preserve required vent clearances, position the collar correctly and select an appropriate exterior sealant.

Explore more HVAC ducting and venting supplies from Xpress Supply. For additional information about home heating and energy efficiency, visit the U.S. Department of Energy Energy Saver.